Is Natasha bugged in the current version or is it intentional that (as far as I can tell) you're only able to stay on her route if you reject her first on day 13 and then accept her, rather than accept her right away?
After accepting her right away on Day 13, when I got to day 18 and visited her, we just talked normally and then the scene ended, there was no talk with her husband about cuckolding sex even though, as far as I can understand it from the walk-through (though it's for 0.25), it should not matter what you do as long as you don't reject her twice.
looking at the code I noticed that the events on day 18 are all controlled by the flag "day13_nat_irresistible" that only seems to be set to true if you reject her first and then accept her.
Or does accepting her right away on day 13 still keep her route active in some way (later days and/or future content?) and it's "only" the content on day 18 that you're locked out from? Haven't been digging around in the code for later days yet since I don't want to stumble onto to many spoilers.